EP0477877B1 - Positive Schussfadenzuführvorrichtung für Düsenwebmaschine - Google Patents

Positive Schussfadenzuführvorrichtung für Düsenwebmaschine Download PDF

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Publication number
EP0477877B1
EP0477877B1 EP91116267A EP91116267A EP0477877B1 EP 0477877 B1 EP0477877 B1 EP 0477877B1 EP 91116267 A EP91116267 A EP 91116267A EP 91116267 A EP91116267 A EP 91116267A EP 0477877 B1 EP0477877 B1 EP 0477877B1
Authority
EP
European Patent Office
Prior art keywords
yarn
picking
positive feed
weft yarn
feed mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91116267A
Other languages
English (en)
French (fr)
Other versions
EP0477877A1 (de
Inventor
Yujiro Takegawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsudakoma Corp
Original Assignee
Tsudakoma Corp
Tsudakoma Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsudakoma Corp, Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Corp
Publication of EP0477877A1 publication Critical patent/EP0477877A1/de
Application granted granted Critical
Publication of EP0477877B1 publication Critical patent/EP0477877B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means

Definitions

  • the present invention relates to a picking device for a fluid jet loom and, more particularly, to a positive feed picking device provided with a positive feed mechanism for positively feeding a weft yarn for picking.
  • the main picking nozzle of a fluid jet loom needs to pick a weft yarn against a resistance against pulling out the weft yarn from a yarn measuring and storing device.
  • US-A-4 932 442 discloses a positive feed picking device for a fluid jet loom according to the preamble of claim 1.
  • the control of the positive feed mechanism is insufficient with respect to preventing a yarn breakage.
  • Another object of the present invention is to further improve the efficiency of positive yarn feed operation by synchronizing the yarn feed operation of a positive feed mechanism and the weaving operation of a loom.
  • the said controller stops the operation of the positive feed mechanism upon the reception of a detection signal provided by the sensor upon the detection of delivery of the predetermined length of the weft yarn from the yarn measuring and storing device; and in that a motor controller controls the operating speed of a motor for driving a drive roller of the positive feed mechanism so that the operating speed of the motor varies with the angular position of the main shaft of the fluid jet loom according to a speed control characteristic during the operation of the positive feed mechanism.
  • said speed control characteristic is represented by an upward convex curve on a rectangular coordinate system in which speed is measured upward on the vertical axis and the angular position of the main shaft of the loom is measured to the right on the horizontal axis.
  • a weft yarn 2 unwound from a yarn package 3 is measured by, for example, a yarn measuring and storing device 4 of a fixed drum type and a predetermind length of the weft yarn 2 for one picking cycle, for example, a length corresponding to four coils on the yarn storage drum 6 of the yarn measuring and storing device 4, is stored on the yarn storage drum 6.
  • the weft yarn 2 is held on the yarn storage drum 6 with a holding pin 7 and a rotary yarn guide 5 revolves around the yarn storage drum 6 to wind the weft yarn 2 around the yarn storage drum 6 in a predetermined number of coils.
  • the holding pin 7 is retracted by a pin operating device 8 to allow the weft yarn 2 stored on the yarn storage drum 6 to be unwound from the yarn storage drum 6 and to be picked into a shed 11 formed by warp yarns 10 by a fluid jetted by a main picking nozzle 9.
  • the positive feed picking device 1 comprises, as principal components, a positive feed mechanism 12, a sensor 13, a controller 14 and a motor controller 15.
  • the positive feed mechanism 12 is disposed between the yarn measuring and storing device 4 and the main picking nozzle 9 and comprises a drive roller 17, a servomotor 16 for driving the drive roller 17, a movable driven roller 18 capable of being brought into contact with the driveroller 17, and a lever 19 supporting the driven roller 18.
  • the lever 19 has one end pivotally supported on a shaft 20 at a fixed position and the other end supporting the driven roller 18.
  • the lever 20 is turned on the shaft 20 by, for example, an electromagnetic actuator 21 between a position where the driven roller 18 is separted from the drive roller 17 and a position where the driven roller 18 is in contact with the drive roller 17 to feed the weft yarn 2.
  • the sensor 13 may be disposed at a position between a position where the weft yarn 2 is unwound from the yarn storage drum 6 and a position immediately before an exit of the shed 11 on a yarn passage. In this embodiment, the sensor 13 is disposed close to the circumference of the yarn storage drum 6 and near the holding pin 7 to detect the number of coils of weft yarn unwound from the yarn storage drum 6.
  • the controller 14 receives an angular position signal indicating an angular position of the main shaft 22 of the loom provided by a rotary encoder 23 and a length signal provided by the sensor 13, and controls the pin operating device 8, the electromagnetic actuator 21 and the motor controller 15.
  • the motor controller 15 is provided with a programs and a table containing the surface speed of the drive roller 17 in relation with the angular position of the main shaft 22.
  • the motor controller 15 provides a command signal on the basis of an angular position signal indicating an angular position of the main shaft 22 provided by the rotary encoder 23 to control the operating speed of the servomotor 16.
  • the yarn measuring and storing device 4 stores four coils of weft yarn 2 on the yarn storage drum 6 for each picking cycle.
  • the controller 14 drives the pin operating device 8 to release the weft yarn 2 stored on the yarn storage drum 6 by retracting the holding pin 7.
  • the controller 14 gives a command signal to the motor controller 15 and drives the electromagnetic actuator 21 so that the driven roller 18 is brought into contact with the drive roller 17 to nip the weft yarn 2 therebetween.
  • the motor controller 15 gives a driving signal to drive the servomotor 16 so that the drive roller 17 is driven for rotation at a surface speed corresponding to the angular position of the main shaft 22 of the loom according to a speed control characteristic represented by an upward convex curve.
  • a speed control characteristic represented by an upward convex curve.
  • the surface speed of the drive roller 17 increases sharply with time after the picking period has been started, reaches a maximum in a time in which one or two coils of the weft yarn 2 is unwound from the yarn storage drum 6, and then decreases gradually with time.
  • the main picking nozzle 9 jets out picking fluid to pick the weft yarn 2 into the shed 11.
  • the drive roller 17 and the driven roller 18 rotate according to the speed control characteristic to pull out the weft yarn 2 positively from the yarn storage drum 6 and feed the same to the main picking nozzle 9. Accordingly, the main picking nozzle 9 is subjected scarcely to resistance in picking the weft yarn 2 into the shed 11 formed by the warp yarns 10.
  • the controller 14 drives the electromagnetic actuator 21 so that the driven roller 18 is moved away from the drive roller 17 to stop the positive feed operation of the positive feed mechanism 12.
  • the sensor 13 may be disposed at a position shown in Fig. 1 and time when three coils of weft yarn are unwound from the yarn storage drum 6 may be estimated by detecting time when two and a half coils of weft yarn 2 are unwound from the yarn storage drum 6 by the sensor 13.
  • a picking terminating period start at the time when the sensor 13 detects the two and a half unwound coils of weft yarn 2 and the weft yarn 2 is driven for picking only by the picking force of the main picking nozzle 9. Since the operating speed of the servomotor 16, namely, the surface speed of the drive roller 17, has sufficiently been reduced before the positive feed operation is stopped, the weft yarn 2 is not subjected to the sharp variation of yarn tension during the picking terminating period and hence the weft yarn 2 is not broken.
  • the controller 14 drives the pin operating device 8 to bring the holding pin 7 into contact with the circumference of the yarn storage drum 6 to check the feed of the weft yarn 2. Accordingly, upon the completion of unwinding the four coils of weft yarn 2, the weft yarn 2 is held on the yarn storage drum 6 with the holding pin 7, and then the rotary yarn guide 5 is actuated to wind new coils of weft yarn 2 on the yarn storage drum 6 for the next picking cycle.
  • the positive feed mechanism controlled so as to start its operation at the start of a picking period and to stop its operation before the holding pin 7 holds the weft yarn. Accordingly, a predetermined length of weft yarn can accurately be fed by the yarn measuring and storing device, the frequency of yarn breakage by the roller's nipping or by cause of high tension is reduced, and the effiency of the yarn feed operation of the positive feed mechanism is enhanced.
  • a positive feed picking device in accordance with the present invention may employ a sensor 13 for detecting the length of weft yarn inserted in the shed 11, disposed in the shed 11 as indicated by alternate long and two short dashes lines in Fig. 1.
  • the positive feed mechanism 12 may be provided, instead of the drive roller 17 and the driven roller 18, with a drive roller 17 and a pressing member 24 for pressing the weft yarn 2 against the circumference of the drive roller 17, and the pressing member 24 may be operated directly by an electromagnetic actuator 21.
  • the positive feed mechanism 12 may be provided with a drive roller and a driven roller kept continuously in contact with the drive roller, and with means for positively advancing the weft yarn to or positively retracting the weft yarn from the pair of rollers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (2)

  1. Eine positive Schußfadenzuführvorrichtung (1) für eine Düsenwegmaschine mit:
    einer Fadenmeß- und Speichereinrichtung (4) zum Messen und Speichern eines Schußfadens (2);
    einer Hauptzufuhrdüse (9) zum Zuführen des Schußfadens; und
    einem positiven Zuführmechanismus (12), der zwischen der Fadenmeß- und Speichereinrichtung (4) und der Hauptzuführdüse (9) angeordnet ist, um den Schußfaden (2) in einem Zuführzyklus positiv zu der Hauptzuführdüse zu fördern; und einem Sensor (13), der an einer Position auf einen Garnweg, entlang dem der Schußfaden (2) von der Fadenmeß- und Speichereinrichtung (4) geliefert wird, verläuft, um die Zufuhr einer vorgegebenen Länge des Schußfadens (2) von der Fadenmeß- und Speichereinrichtung zu erkennen; wobei ein Kontroller (14) den positiven Zuführmechanismus (12) bei dem Start einer Zuführperiode betätigt, um den Schußfaden (2) positiv zu der Hauptzuführdüse (9) zuzuführen,
    dadurch gekennzeichnet, daß
    der Kontroller den Betrieb des positiven Zuführmechanismus (12) bei dem Empfang eines Detektionssignals, das von dem Sensor (13) bei der Erkennung der Zufuhr einer vorgegebenen Länge des Schußfadens (2) von der Fadenmeß- und Speichereinrichtung (4) gestoppt und dadurch, daß eine Motorsteuerung (15) die Betriebsgeschwindigkeit eines Motors (16) zum Antreiben einer antreibenden Rolle (17) des positiven Zufuhrmechanismus (12) derart steuert, daß die Betriebsgeschwindigkeit des Motors (16) mit der Winkelgeschwindigkeit der Hauptwelle der Düsenwebmaschine entsprechend einer Geschwindigkeitssteuerungcharakteristik während des Betriebs des positiven Zufuhrmechanismus (12) variiert.
  2. Eine positive Schußfadenzuführvorrichtung für eine Düsenwebmaschine nach Anspruch 1, wobei die Charakteristik der Geschwindigkeitssteuerung durch eine in einem rechtwinkligen Koordinatensystem, in der die Geschwindigkeit auf der vertikalen Achse nach oben und die Winkelposition der Hauptwelle der Webmaschine auf der horizontalen Achse nach rechts abgetragen ist, nach oben konvexe Kurve repräsentiert wird.
EP91116267A 1990-09-27 1991-09-24 Positive Schussfadenzuführvorrichtung für Düsenwebmaschine Expired - Lifetime EP0477877B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP02258312A JP3134879B2 (ja) 1990-09-27 1990-09-27 流体噴射式織機の積極フィードよこ入れ装置
JP258312/90 1990-09-27

Publications (2)

Publication Number Publication Date
EP0477877A1 EP0477877A1 (de) 1992-04-01
EP0477877B1 true EP0477877B1 (de) 1996-03-27

Family

ID=17318503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116267A Expired - Lifetime EP0477877B1 (de) 1990-09-27 1991-09-24 Positive Schussfadenzuführvorrichtung für Düsenwebmaschine

Country Status (5)

Country Link
US (1) US5154209A (de)
EP (1) EP0477877B1 (de)
JP (1) JP3134879B2 (de)
KR (1) KR930012220B1 (de)
DE (1) DE69118290T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10238895C5 (de) * 2002-08-24 2009-04-30 Sec Ship's Equipment Centre Bremen Gmbh Kuppelstück zum Verbinden zweier übereinander gestapelter Container, Anordnung übereinander gestapelter Container und Verfahren zum Verbinden übereinander gestapelter Container mit solchen Kuppelstücken

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335700A (en) * 1992-03-24 1994-08-09 Nissan Motor Co., Ltd. Weft picking system for a fluid jet loom including a roller type traction device
DE4219306A1 (de) * 1992-06-12 1993-12-16 Iro Ab Verfahren und Vorrichtung zum Liefern von Schußfäden
BE1009297A3 (fr) * 1993-04-16 1997-02-04 Nissan Texsys Co Ltd Systeme d'insertion de trame pour metier a jet de fluide.
DE4324160A1 (de) * 1993-07-19 1995-01-26 Iro Ab Eintragsystem für eine Düsenwebmaschine
EP0685585B1 (de) * 1994-05-30 1999-06-09 Sulzer RàœTi Ag Vorrichtung und Verfahren zur Behebung von Unregelmässigkeiten beim Eintrag eines Schussfadens in einen Webrotor einer Reihenfachwebmaschine
DE59408395D1 (de) * 1994-05-30 1999-07-15 Rueti Ag Maschf Vorrichtung und Verfahren zur Behebung von Unregelmässigkeiten beim Eintrag eines Schussfadens in einen Webrotor einer Reihenfachwebmaschine
KR980009576A (ko) * 1995-09-29 1998-04-30 이케우찌 마사토 유체직기에 있어서의 씨실송출장치
JPH10102353A (ja) * 1996-09-26 1998-04-21 Micron Kk 織機における緯糸制御装置
JPH10158956A (ja) * 1996-11-21 1998-06-16 Micron Kk 流体噴射式織機の緯糸送り装置
EP0866155B1 (de) * 1997-03-14 2001-11-07 Benninger AG Verfahren und Vorrichtung zur Kontrolle der Teilfachbildung an einer Schärmaschine
DE19947431A1 (de) * 1999-10-02 2001-04-05 Stang Hans Peter Band- oder Fadenführung
US7156337B2 (en) * 2000-10-18 2007-01-02 Iropa Ag Method for inserting weft yarns
CN102251339B (zh) * 2011-07-21 2013-04-17 北京经纬纺机新技术有限公司 喷气织机止纱销控制器及其控制方法
JP7260387B2 (ja) * 2019-05-06 2023-04-18 津田駒工業株式会社 水噴射式織機における緯入れ方法及び装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05158563A (ja) * 1991-12-09 1993-06-25 Tokuden Co Ltd 交流電力調整装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5158563A (ja) * 1974-11-15 1976-05-21 Tsudakoma Ind Co Ltd Kukifunshashikyokoirehohoto sochi
FR2550236B1 (fr) * 1983-08-02 1986-01-10 Alsacienne Constr Mat Tex Dispositif mesureur de trame pour metier a tisser
US5010834A (en) * 1987-10-31 1991-04-30 Juki Corporation Clutch type roller feed for a sewing machine needle thread
JPH0226957A (ja) * 1988-07-12 1990-01-29 Nissan Motor Co Ltd 流体噴射式織機の緯入れ制御方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05158563A (ja) * 1991-12-09 1993-06-25 Tokuden Co Ltd 交流電力調整装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10238895C5 (de) * 2002-08-24 2009-04-30 Sec Ship's Equipment Centre Bremen Gmbh Kuppelstück zum Verbinden zweier übereinander gestapelter Container, Anordnung übereinander gestapelter Container und Verfahren zum Verbinden übereinander gestapelter Container mit solchen Kuppelstücken

Also Published As

Publication number Publication date
KR920006561A (ko) 1992-04-27
DE69118290D1 (de) 1996-05-02
JP3134879B2 (ja) 2001-02-13
US5154209A (en) 1992-10-13
JPH04136237A (ja) 1992-05-11
DE69118290T2 (de) 1996-08-29
KR930012220B1 (ko) 1993-12-24
EP0477877A1 (de) 1992-04-01

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